For a particle pe A. Magnitude of particle velocity (speed) remains constant.
B. Particle velocity remains directed perpendicular to radius vector.
C. Direction of acceleration keeps changing as particle moves.
D. Angular momentum is constant in magnitude but direction keeps changing.
It is given that a particle is performing uniform motion, suggesting that particle’s speed is constant. Also from the figure, we can see that the particle’s velocity vector is always perpendicular to the radius vector. But since, particle’s direction is always changing; therefore, it is accelerating even though speed is constant. Angular momentum’s direction will always be perpendicular to the plane of the circular path.
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